216430568 has 8 divisors (see below), whose sum is σ = 405807330. Its totient is φ = 108215280.

The previous prime is 216430549. The next prime is 216430573. The reversal of 216430568 is 865034612.

It can be written as a sum of positive squares in only one way, i.e., 212518084 + 3912484 = 14578^2 + 1978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13526903 + ... + 13526918.

Almost surely, 2^216430568 is an apocalyptic number.

It is an amenable number.

216430568 is a deficient number, since it is larger than the sum of its proper divisors (189376762).

216430568 is a wasteful number, since it uses less digits than its factorization.

216430568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27053827 (or 27053823 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 216430568 is about 14711.5793849607. The cubic root of 216430568 is about 600.3984094653.

The spelling of 216430568 in words is "two hundred sixteen million, four hundred thirty thousand, five hundred sixty-eight".